Boosters are only in effect for a limited time. However, instead of having a duration of effect, Boosters have a set expiration date. Boosters can be obtained from certain Events, and take effect as soon as the Player obtains them. Stacking multiple of the same Boosters is possible.

Final Fantasy Booster (ファイナルファンタジーブースト,Fainaru Fantajī Būsuto?, lit. "Final Fantasy Boost") is a type of Booster that increases the damage dealt with Medals featuring characters from the Final Fantasy series. It affects the following Medals:

Booster [The World Ends with You] (すばらしきこのせかいブースト,Subarashiki Kono Sekai Būsuto?, lit. "The World Ends with You Boost") is a type of Booster that increases the damage dealt with Medals featuring characters from The World Ends with You. It affects the following Medals: